Europe is the correct answer i think
This period was known as the reign of terror
After the french revolution, Robespierre started killing anyone who was perceived as a political opponent, even if they weren't political opponents in reality. There were police spies everywhere who would tell on people and people would get a fake trial in which they would be found guilty and would be executed.
Because Germany had sent mexico a telegram that promised to give them Texas back & the telegram was interupted by UK who sent it to Texas
The 13th amendment, which prohibits slavery, has been violated.